Spring-hinge



(Model.)

D. NICKEL 8v C. ZATTAN.

' SPRING HINGE.. No. 297,946. Patented Apr. '29, 1884.

aff 7 lllllllllllm nnnunnr Immum UNITED STATES i PATENT OFFICE..

DAVID NICKEL AND CHARLES ZA'ITAN, OF MORRIS, ILLINOIS.

SPRING-HINGE.

SPECIFICATION forming part of Letters Patent No. 297,946, dated April 29, 1884.

Application filed February 4, 1884. (Model.) u

To a/ZZ whom it' may concern:

Be it known that we, DAVID NICKEL and CHARLES ZATTAN, citizens of the United States, residing at Morris, in the county of Grundy and State of Illinois, have invented certain new and useful. Improvements in Spring Door-Hinges; and we do declare the following to bea full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or gures of reference marked thereon, which form a part of this specication.

Figure 1 of the drawings is a front View of our hinge. Fig. 2 is a vertical sectional view. Figs. 3 and 4 are longitudinal sectional views of the saine, and Figs. 5, 6, and 7 are detail views.

This invention has relation to double-acting spring-hinges for doons; and it consists in the construction and novel arrangement of the bearing-loops formed on the hinge-plates and the cam lugs or dogs of the shiftingk spring centers, all as hereinafter set forth. v

In the accompanying drawings, the letters a c designate the hinge-plates, which are connected by center bearings at b b, these bearings projecting from the planes of the plates, as shown. No center pin is required-in the construction. Theinner margin of each hingeplate is formed with a bearing-loop, c, near each end, adjacent to the center bearing, said bearing-loop having a rounded portion or bearing, d. Y

c represents the springVwhich is an ordinary coiled-wire spring, having its terminal ends nand n respectively turned up and down to form holding-catches.

Each inner bearing, b, is formed with a partial raised 'Inargin, 7c, on its outer or back portion, and next to the inner bearing, I), is arranged the outer center plate, l, whichis piv oted to the inner center plate, m. The latter plate is formed with an inwardly-projecting portion or bearing, p, for theend of the spring, a circumscribing channel or rabbet,`r, serving to receive the end whirl of the spring, while the projection p extends a short distance within the whirl, as shown.

The center plates, l and m, areformed with curved lugs or cam-shaped dogs z z', which project in opposite directions, and engage by their inner curved edges, s, the bearingsd of the loops c. The cam-dog z of the inner plate is formed with a shoulder, c, at its heel, which Vis designed, when the spring is put into position, to engage its terminal catch, as shown. The cam-dog z of the upper and lower inner plates Z are on opposite sides, so that the 6o ends of the spring will be held against its tension. .The outer center plates,m,are adapted, when the hinge-plates are rspread apart to their fullest extent, to move back to the marginal elevations or stops k of the inner beari ings, b, of the hinge-plates. Vhemhowever, the hinge-plates are closed toward each other, the center plates Z, and m, and the spring held thereby shift outward from the pivotal or axial line of the hinge-plates, this eccentric k7o position being increased as the hinge-plates are closed nearer together, until the loopbearings of the hinge-plates arebrought around forward of the axial line of the center bearings of the hinge-plates. In this position the action of the spring through the cam-dogs is reversed. While' before the spring, being `in central position, operated to force the hingeplates open; now the spring, being in eccentric position, operates to draw the hinge-plates 8o toward` each other. In each f these movements the operation of the spring upon the hinge-plates is facilitated by the cam-dogs, which, on account of their sliding motion on the loop-bearings, render the action of the hinge easy and smooth, preventing the harshness and sudden jerks which would accompany a more positive and rigid connection. The action of the spring is moderated and equalized or softened without detractng from 9o m and having cam dogs or lugs adapted to enl l l gage the bearings of the loops and slide thereon, substantially as specified.

In testimony whereof we afix our signatures in presence of two witnesses.

DAVID NICKEL. CHARLES ZATTAN.

\Vitnesses:

7. D. HITCHCOCK, J osnPH KCHNLE. 

